Cabinet for a light source



FIG. 1 is a front elevational view of a cabinet for a light source embodying my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a side elevational view thereof, the portions of the ceiling and wall being shown in broken lines for illustrative purposes only. 

The ornamental design for a cabinet for a light source, as shown and described. 